bug#19831: 25.0.50; Can't build emacs 25.0.5 with libpng16 support (only libpng15)

bug#19831: 25.0.50; Can't build emacs 25.0.5 with libpng16 support (only libpng15)

[Tory S. Anderson]

I have libpng16 (and 15) installed with dev files; my libpng.so points to version 16. But emacs 25.0.5 refuses to work with 16. Although the config log is full of references to lpng16, it seems to choose to load with lib15 (and won't build with png support if I don't make v 15 available). This is breaking other programs that expect to be using the latest libpng on the computer.

Emacs will not allow me to build with png support if I do not have `/usr/lib64/libpng15.so', despite existence of libpng.so in the same location. The linked logs are divided into no-png when I do NOT have libpng15.so at that location, and yes-png when I DO have libpng15.so at that location.

Note the following when things work:
$ whereis libpng
libpng: /usr/lib64/libpng15.so /usr/lib64/libpng16.so /usr/lib64/libpng.so /usr/local/lib/libpng16.a /usr/local/lib/libpng.a /usr/local/lib/libpng.la /usr/local/lib/libpng16.so /usr/local/lib/libpng.so /usr/local/lib/libpng16.la /usr/share/man/man3/libpng.3.gz

There is, of course, no libpng15.so there in the fail cases.

Download the four logs in the following archive:
http://toryanderson.com/files/25pngerrors.tar.gz

This is on Fedora 20 64-bit. 



In GNU Emacs 25.0.50.4 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.9)
 of 2015-02-10 on localhost.localdomain
Repository revision: df1e4ea210c081c969e092628aa999b1a4d59dfd
Windowing system distributor `Fedora Project', version 11.0.11404000
System Description:	Fedora release 20 (Heisenbug)

Configured features:
XPM JPEG TIFF GIF PNG SOUND GSETTINGS NOTIFY GNUTLS FREETYPE XFT ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Shell

Minor modes in effect:
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  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent messages:
Checking new news...
Reading active file via nnml...
Reading incoming mail from file...
nnml: Reading incoming mail (no new mail)...done
Reading active file via nnml...done
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Mark set [2 times]
Making gnus-newsgroup-name local to *unsent mail* while let-bound!
Update Org Contacts Database

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bug#19831: 25.0.50; Can't build emacs 25.0.5 with libpng16 support (only libpng15)

[Eli Zaretskii]

> From: torys.anderson@gmail.com (Tory S. Anderson)
> Date: Tue, 10 Feb 2015 12:57:53 -0500
> 
> 
> I have libpng16 (and 15) installed with dev files; my libpng.so points to version 16. But emacs 25.0.5 refuses to work with 16. Although the config log is full of references to lpng16, it seems to choose to load with lib15 (and won't build with png support if I don't make v 15 available). This is breaking other programs that expect to be using the latest libpng on the computer.

What does this shell command display:

  libpng-config --cflags

It looks like this is what's responsible for the fact that Emacs
decides you have libpng15 installed.  So I think the way you installed
libpng16 is missing the update of libpng-config.

bug#19831: 25.0.50; Can't build emacs 25.0.5 with libpng16 support (only libpng15)

[Tory S. Anderson]

I see: 

$ libpng-config --cflags
-I/home/torys/anaconda/include/libpng15

So, I uninstalled libpng and reinstalled it, carefully using the package and following the directions from http://www.libpng.org/pub/png/libpng.html
And yet, to my frustration, afterwards I STILL received: 

$ libpng-config --cflags
-I/home/torys/anaconda/include/libpng15

I can't seem to get around this. Any suggestions would be appreciated. 


Eli Zaretskii <eliz@gnu.org> writes:

>> From: torys.anderson@gmail.com (Tory S. Anderson)
>> Date: Tue, 10 Feb 2015 12:57:53 -0500
>> 
>> 
>> I have libpng16 (and 15) installed with dev files; my libpng.so points to version 16. But emacs 25.0.5 refuses to work with 16. Although the config log is full of references to lpng16, it seems to choose to load with lib15 (and won't build with png support if I don't make v 15 available). This is breaking other programs that expect to be using the latest libpng on the computer.
>
> What does this shell command display:
>
>   libpng-config --cflags
>
> It looks like this is what's responsible for the fact that Emacs
> decides you have libpng15 installed.  So I think the way you installed
> libpng16 is missing the update of libpng-config.

bug#19831: 25.0.50; Can't build emacs 25.0.5 with libpng16 support (only libpng15)

[Ivan Shmakov]

>>>>> Tory S Anderson <torys.anderson@gmail.com> writes:

[…]

 > And yet, to my frustration, afterwards I STILL received:

 > $ libpng-config --cflags -I/home/torys/anaconda/include/libpng15

 > I can't seem to get around this.  Any suggestions would be
 > appreciated.

	My guess is that the ‘libpng-config’ executable coming first in
	your $PATH is still the one belonging to libpng15, not libpng16.

	What’s the output of $ type libpng-config?  Do that file’s mtime
	and ctime (try $ stat on the file) reflect the date and time the
	new version was installed?

	If it’s indeed the “wrong” libpng-config which gets used, –
	check the value of the $PATH environment variable itself and
	either adjust as needed for the directory with the “right”
	libpng-config to come first there, /or/ somehow prevent the
	“wrong” file from being found (either $ chmod a-x it, or perhaps
	rename it.)

-- 
FSF associate member #7257  np. Acoustic Earth – Electric Sky — David Modica

bug#19831: 25.0.50; Can't build emacs 25.0.5 with libpng16 support (only libpng15)

[Lars Ingebrigtsen]

Ivan Shmakov <ivan@siamics.net> writes:

>>>>>> Tory S Anderson <torys.anderson@gmail.com> writes:
>
> […]
>
>  > And yet, to my frustration, afterwards I STILL received:
>
>  > $ libpng-config --cflags -I/home/torys/anaconda/include/libpng15
>
>  > I can't seem to get around this.  Any suggestions would be
>  > appreciated.
>
> 	My guess is that the ‘libpng-config’ executable coming first in
> 	your $PATH is still the one belonging to libpng15, not libpng16.
>
> 	What’s the output of $ type libpng-config?  Do that file’s mtime
> 	and ctime (try $ stat on the file) reflect the date and time the
> 	new version was installed?
>
> 	If it’s indeed the “wrong” libpng-config which gets used, –
> 	check the value of the $PATH environment variable itself and
> 	either adjust as needed for the directory with the “right”
> 	libpng-config to come first there, /or/ somehow prevent the
> 	“wrong” file from being found (either $ chmod a-x it, or perhaps
> 	rename it.)

More information was requested, but no response was given within a few
months, so I'm closing this bug report.  If the problem still exists,
please reopen this bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no